我的C#Windows-Forms项目有问题。我想画一个正方形,我想在一个图片框中显示正方形。我怎么能这样做?
这是我绘制正方形的函数:
public void DrawingSquares(int x, int y)//the function gets x and y to know where to print the square.
{
Graphics graphicsObj;
graphicsObj = this.CreateGraphics();
Pen myPen = new Pen(Color.Black, 5);
Rectangle myRectangle = new Rectangle(x, y, 100, 100);
graphicsObj.DrawRectangle(myPen, myRectangle);
}
答案 0 :(得分:2)
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.pictureBox1.Image = this.Draw(this.pictureBox1.Width, this.pictureBox1.Height);
}
public Bitmap Draw(int width, int height)
{
var bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
var graphics = Graphics.FromImage(bitmap);
graphics.SmoothingMode = SmoothingMode.AntiAlias;
graphics.FillRectangle(new SolidBrush(Color.Tomato), 10, 10, 100, 100);
return bitmap;
}
}
}
这是我的Form1.cs
你应该有类似的东西
答案 1 :(得分:1)
您必须在图片框中添加PaintEventHandler
并在其中绘制矩形:
private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
...
e.Graphics.DrawRectangle(myPen, myRectangle);
}
答案 2 :(得分:-1)
public Bitmap Draw()
{
var bitmap = new Bitmap(width,height, PixelFormat.Format32bppArgb);
var graphics = Graphics.FromImage(bitmap);
graphics.SmoothingMode = SmoothingMode.AntiAlias;
graphics.FillRectangle(new SolidBrush(Color.Tomato), 10, 10, 100, 100);
}
this.pictureBox1.Image = new PieChart().Draw();
所以,如果你只是返回一个位图,那就可以了